--- /dev/null
+/*
+ * BBS View renderer module for WebCit
+ *
+ * Note: we briefly had a dynamic UI for this. I thought it was cool, but
+ * it was not received well by the user community. If you want to play
+ * with it, go get commit dcf99fe61379b78436c387ea3f89ebfd4ffaf635 of
+ * bbsview_renderer.c and have fun.
+ *
+ * Copyright (c) 1996-2012 by the citadel.org team
+ *
+ * This program is open source software. You can redistribute it and/or
+ * modify it under the terms of the GNU General Public License, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#define RANGE 5
+
+#include "webcit.h"
+#include "webserver.h"
+#include "dav.h"
+
+/*
+ * Data which gets passed around between the various functions in this module
+ *
+ */
+struct bbsview {
+ long *msgs; /* Array of msgnums for messages we are displaying */
+ int num_msgs; /* Number of msgnums stored in 'msgs' */
+ long lastseen; /* The number of the last seen message in this room */
+ int alloc_msgs; /* Currently allocated size of array */
+ int requested_page; /* Which page number did the user request? */
+ int num_pages; /* Total number of pages in this room */
+ long start_reading_at; /* Start reading at the page containing this message */
+};
+
+
+/*
+ * Attempt to determine the closest thing to the "last seen message number" using the
+ * results of the GTSN command
+ */
+long bbsview_get_last_seen(void)
+{
+ char buf[SIZ] = "0";
+
+ serv_puts("GTSN");
+ serv_getln(buf, sizeof buf);
+ if (buf[0] == '2') {
+ char *colon_pos;
+ char *comma_pos;
+
+ comma_pos = strchr(buf, ','); /* kill first comma and everything to its right */
+ if (comma_pos) {
+ *comma_pos = 0;
+ }
+
+ colon_pos = strchr(buf, ':'); /* kill first colon and everything to its left */
+ if (colon_pos) {
+ strcpy(buf, ++colon_pos);
+ }
+ }
+
+ return(atol(buf));
+}
+
+
+
+/*
+ * Entry point for message read operations.
+ */
+int bbsview_GetParamsGetServerCall(SharedMessageStatus *Stat,
+ void **ViewSpecific,
+ long oper,
+ char *cmd,
+ long len,
+ char *filter,
+ long flen)
+{
+ struct bbsview *BBS = malloc(sizeof(struct bbsview));
+ memset(BBS, 0, sizeof(struct bbsview));
+ *ViewSpecific = BBS;
+
+ Stat->startmsg = (-1); /* not used here */
+ Stat->sortit = 1; /* not used here */
+ Stat->num_displayed = DEFAULT_MAXMSGS; /* not used here */
+ BBS->requested_page = 0;
+ BBS->lastseen = bbsview_get_last_seen();
+ BBS->start_reading_at = 0;
+
+ /* By default, the requested page is the first one. */
+ if (havebstr("start_reading_at")) {
+ BBS->start_reading_at = lbstr("start_reading_at");
+ BBS->requested_page = (-4);
+ }
+
+ /* However, if we are asked to start with a specific message number, make sure
+ * we start on the page containing that message
+ */
+
+ /* Or, if a specific page was requested, make sure we go there */
+ else if (havebstr("page")) {
+ BBS->requested_page = ibstr("page");
+ }
+
+ /* Otherwise, if this is a "read new" operation, make sure we start on the page
+ * containing the first new message
+ */
+ else if (oper == 3) {
+ BBS->requested_page = (-3);
+ }
+
+ if (havebstr("maxmsgs")) {
+ Stat->maxmsgs = ibstr("maxmsgs");
+ }
+ if (Stat->maxmsgs == 0) Stat->maxmsgs = DEFAULT_MAXMSGS;
+
+ /* perform a "read all" call to fetch the message list -- we'll cut it down later */
+ rlid[2].cmd(cmd, len);
+
+ return 200;
+}
+
+
+/*
+ * This function is called for every message in the list.
+ */
+int bbsview_LoadMsgFromServer(SharedMessageStatus *Stat,
+ void **ViewSpecific,
+ message_summary* Msg,
+ int is_new,
+ int i)
+{
+ struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
+
+ if (BBS->alloc_msgs == 0) {
+ BBS->alloc_msgs = 1000;
+ BBS->msgs = malloc(BBS->alloc_msgs * sizeof(long));
+ memset(BBS->msgs, 0, (BBS->alloc_msgs * sizeof(long)) );
+ }
+
+ /* Check our buffer size */
+ if (BBS->num_msgs >= BBS->alloc_msgs) {
+ BBS->alloc_msgs *= 2;
+ BBS->msgs = realloc(BBS->msgs, (BBS->alloc_msgs * sizeof(long)));
+ memset(&BBS->msgs[BBS->num_msgs], 0, ((BBS->alloc_msgs - BBS->num_msgs) * sizeof(long)) );
+ }
+
+ BBS->msgs[BBS->num_msgs++] = Msg->msgnum;
+
+ return 200;
+}
+
+
+int bbsview_sortfunc(const void *s1, const void *s2) {
+ long l1;
+ long l2;
+
+ l1 = *(long *)(s1);
+ l2 = *(long *)(s2);
+
+ if (l1 > l2) return(+1);
+ if (l1 < l2) return(-1);
+ return(0);
+}
+
+
+int bbsview_RenderView_or_Tail(SharedMessageStatus *Stat,
+ void **ViewSpecific,
+ long oper)
+{
+ struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
+ int i;
+ int seq;
+ const StrBuf *Mime;
+ int start_index = 0;
+ int end_index = 0;
+ int go_to_the_very_end = 0;
+
+ if (Stat->nummsgs > 0) {
+ syslog(LOG_DEBUG, "sorting %d messages\n", BBS->num_msgs);
+ qsort(BBS->msgs, (size_t)(BBS->num_msgs), sizeof(long), bbsview_sortfunc);
+ }
+
+ if ((BBS->num_msgs % Stat->maxmsgs) == 0) {
+ BBS->num_pages = BBS->num_msgs / Stat->maxmsgs;
+ }
+ else {
+ BBS->num_pages = (BBS->num_msgs / Stat->maxmsgs) + 1;
+ }
+
+ /* If the requested page number is -4,
+ * it means "whichever page on which msg#xxxxx starts"
+ * Change to the page number which contains that message.
+ */
+ if (BBS->requested_page == (-4)) {
+ if (BBS->num_msgs == 0) {
+ BBS->requested_page = 0;
+ }
+ else {
+ for (i=0; i<BBS->num_msgs; ++i) {
+ if (
+ (BBS->msgs[i] >= BBS->start_reading_at)
+ && (BBS->requested_page == (-4))
+ ) {
+ BBS->requested_page = (i / Stat->maxmsgs) ;
+ }
+ }
+ }
+ }
+
+ /* If the requested page number is -3,
+ * it means "whichever page on which new messages start"
+ * Change that to an actual page number now.
+ */
+ if (BBS->requested_page == (-3)) {
+ if (BBS->num_msgs == 0) {
+ /*
+ * The room is empty; just start at the top and leave it there.
+ */
+ BBS->requested_page = 0;
+ }
+ else if (
+ (BBS->num_msgs > 0)
+ && (BBS->lastseen <= BBS->msgs[0])
+ ) {
+ /*
+ * All messages are new; this is probably the user's first visit to the room,
+ * so start at the last page instead of showing ancient history.
+ */
+ BBS->requested_page = BBS->num_pages - 1;
+ go_to_the_very_end = 1;
+ }
+ else {
+ /*
+ * Some messages are old and some are new. Go to the start of new messages.
+ */
+ for (i=0; i<BBS->num_msgs; ++i) {
+ if (
+ (BBS->msgs[i] > BBS->lastseen)
+ && ( (i == 0) || (BBS->msgs[i-1] <= BBS->lastseen) )
+ ) {
+ BBS->requested_page = (i / Stat->maxmsgs) ;
+ }
+ }
+ }
+ }
+
+ /* Still set to -3 ? If so, that probably means that there are no new messages,
+ * so we'll go to the *end* of the final page.
+ */
+ if (BBS->requested_page == (-3)) {
+ if (BBS->num_msgs == 0) {
+ BBS->requested_page = 0;
+ }
+ else {
+ BBS->requested_page = BBS->num_pages - 1;
+ }
+ }
+
+ /* keep the requested page within bounds */
+ if (BBS->requested_page < 0) BBS->requested_page = 0;
+ if (BBS->requested_page >= BBS->num_pages) BBS->requested_page = BBS->num_pages - 1;
+
+ start_index = BBS->requested_page * Stat->maxmsgs;
+ if (start_index < 0) start_index = 0;
+ end_index = start_index + Stat->maxmsgs - 1;
+
+ for (seq = 0; seq < 3; ++seq) { /* cheap & sleazy way of rendering the page numbers twice */
+
+ if ( (seq == 1) && (Stat->nummsgs > 0)) {
+ /* display the selected range of messages */
+
+ for (i=start_index; (i<=end_index && i<BBS->num_msgs); ++i) {
+ if (
+ (BBS->msgs[i] > BBS->lastseen)
+ && ( (i == 0) || (BBS->msgs[i-1] <= BBS->lastseen) )
+ ) {
+ /* new messages start here */
+ do_template("start_of_new_msgs");
+ if (!go_to_the_very_end) {
+ StrBufAppendPrintf(WC->trailing_javascript, "location.href=\"#newmsgs\";\n");
+ }
+ }
+ if (BBS->msgs[i] > 0L) {
+ read_message(WC->WBuf, HKEY("view_message"), BBS->msgs[i], NULL, &Mime, NULL);
+ }
+ if (
+ (i == (BBS->num_msgs - 1))
+ && (BBS->msgs[i] <= BBS->lastseen)
+ ) {
+ /* no new messages */
+ do_template("no_new_msgs");
+ if (!go_to_the_very_end) {
+ StrBufAppendPrintf(WC->trailing_javascript, "location.href=\"#nonewmsgs\";\n");
+ }
+ }
+ }
+ }
+
+ else if ( (seq == 0) || (seq == 2) ) {
+ int first;
+ int last;
+ /* Display the selecto-bar with the page numbers */
+
+ wc_printf("<div class=\"moreprompt\">");
+ if (seq == 2) {
+ wc_printf("<a name=\"end_of_msgs\">");
+ }
+ wc_printf(_("Go to page: "));
+ if (seq == 2) {
+ wc_printf("</a>");
+ }
+
+ first = 0;
+ last = BBS->num_pages - 1;
+
+ for (i=0; i<=last; ++i) {
+
+ if (
+ (i == first)
+ || (i == last)
+ || (i == BBS->requested_page)
+ || (
+ ((BBS->requested_page - i) < RANGE)
+ && ((BBS->requested_page - i) > (0 - RANGE))
+ )
+ ) {
+
+ if (
+ (i == last)
+ && (last - BBS->requested_page > RANGE)
+ ) {
+ wc_printf("... ");
+ }
+ if (i == BBS->requested_page) {
+ wc_printf("[");
+ }
+ else {
+ wc_printf("<a href=\"readfwd?go=");
+ urlescputs(ChrPtr(WC->CurRoom.name));
+ wc_printf("?start_reading_at=%ld\">",
+ BBS->msgs[i*Stat->maxmsgs]
+ );
+ /* wc_printf("?page=%d\">", i); */
+ wc_printf("<span class=\"moreprompt_link\">");
+ }
+ if (
+ (i == first)
+ && (BBS->requested_page > (RANGE + 1))
+ ) {
+ wc_printf(_("First"));
+ }
+ else if (
+ (i == last)
+ && (last - BBS->requested_page > RANGE)
+ ) {
+ wc_printf(_("Last"));
+ }
+ else {
+ wc_printf("%d", i + 1); /* change to one-based for display */
+ }
+ if (i == BBS->requested_page) {
+ wc_printf("]");
+ }
+ else {
+ wc_printf("</span>");
+ wc_printf("</a>");
+ }
+ if (
+ (i == first)
+ && (BBS->requested_page > (RANGE + 1))
+ ) {
+ wc_printf(" ...");
+ }
+ if (i != last) {
+ wc_printf(" ");
+ }
+ }
+ }
+ wc_printf("</div>\n");
+ }
+ }
+
+ if (go_to_the_very_end) {
+ StrBufAppendPrintf(WC->trailing_javascript, "location.href=\"#end_of_msgs\";\n");
+ }
+ return(0);
+}
+
+
+int bbsview_Cleanup(void **ViewSpecific)
+{
+ struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
+
+ if (BBS->alloc_msgs != 0) {
+ free(BBS->msgs);
+ }
+ free(BBS);
+
+ wDumpContent(1);
+ return 0;
+}
+
+
+void
+InitModule_BBSVIEWRENDERERS
+(void)
+{
+ RegisterReadLoopHandlerset(
+ VIEW_BBS,
+ bbsview_GetParamsGetServerCall,
+ NULL,
+ NULL,
+ NULL,
+ bbsview_LoadMsgFromServer,
+ bbsview_RenderView_or_Tail,
+ bbsview_Cleanup,
+ NULL
+ );
+}
projects / citadel.git / blobdiff